I am gonna have to go with Rocky III. This one could be my favorite just because of the last scene where they walk into the gym for Apollo's "rematch" and as they circle and engage, the screen melts into a painting and "The Eye of the Tiger" plays as the credits roll. I also like this movie because it is the first time we see Rocky completely get his ass kicked and Creed has to come back to train him (since Mick dies) to actually box and use footwork, slips and head movement to get the title back against who might be the best villain in any Rocky movie; Mr. T's ferocious portrayal of Clubber Lang. Rocky also has to learn to switch from southpaw to orthodox to confuse Lang although eventually goes back to his "use your face to block till he tires" strategy. This movie had some great lines and also featured an extraordinarily colorful cast which includes Hulk Hogan ("...i'm not done yet...not with the meatball...") and Jerry Springer (he has a tiny bit part in as a journalist it if you watch closely). Many will disagree but this is my favorite "Rocky" so far.